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04-01-2021
Mathematics

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Find the semi perimeter of a triangle with sides 9cm 12 cm and 30 cm

Respuesta :

Аноним Аноним

04-01-2021

Answer:

25.5 cm

Step-by-step explanation:

[tex]s = \frac{a + b + c}{2} [/tex]

[tex] = \frac{9 + 12 + 30}{2}cm \\ = \frac{51}{2}cm \\ 25.5cm[/tex]

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